As many of you have good point, I should have mentioned this i'bleonly works for specific condition which I am in. My studio is shared with 3other people, and I know the person who is a relative to the landlord.The landlord isn't really interested in keeping a good shape ofthe building nor want to rent out and make monthly income. There is complicatedownership among many relatives and thus half of the building is empty. I waslucky to rent a studio here for dirt cheap, probably only until the soon-to-be-donenew development of the areaThe building does not have any insulation, and it was built onthe fly, without any plan and blueprint. This type of practice was common duringsuper rapid industrialization in Korea back in the 60s(which this building wasbuilt) and tens if not hundreds of nei...see more »As many of you have good point, I should have mentioned this i'bleonly works for specific condition which I am in. My studio is shared with 3other people, and I know the person who is a relative to the landlord.The landlord isn't really interested in keeping a good shape ofthe building nor want to rent out and make monthly income. There is complicatedownership among many relatives and thus half of the building is empty. I waslucky to rent a studio here for dirt cheap, probably only until the soon-to-be-donenew development of the areaThe building does not have any insulation, and it was built onthe fly, without any plan and blueprint. This type of practice was common duringsuper rapid industrialization in Korea back in the 60s(which this building wasbuilt) and tens if not hundreds of neighborhood has been brutally re-developedonly following the rules of profit and efficiency for the past decade. Thisneighborhood has recently gone through the decisions for gentrification butstill no one knows when and how since there are lots of unoccupiedbuildings(uninhabitable) and the price of the land is around U$4000 / sq.ft. dueto its good location in the city.Building anything on topof the roof requires going through changing of building registration whichrequires blueprint of the building, as well as landlord’s inclination. And yes,water isn’t free but it would be more efficient with a little help of passiveevaporative cooling, than constantly cooling uninsulated space with directsunlight, with A/C which won’t really cool down much. Also evaporative coolingobviously requires evaporation, and what I had to do was to let water run for3-5 minutes and let it dry.Here, electricity isowned(and monopolized) by the Government and the consumer rate is punishingly harsh for heavy users(over500 kWh/month), charging around 50cents per kWh compared to US average 12cents, for average US household usage(911kWh). For 911kWh it would result over $400 per month(https://home.kepco.co.kr/kepco/EN/F/B/ENFBPP002.do?menuCd=EN060202). There are many reasons for the high costs of consumer electricity but one of the main contributor is that the vast majority(95%) fuel (coal, natural gas, oil, and nuclear power consist 96% of total production(http://kosis.kr/statHtml/statHtml.do?orgId=388&tblId=TX_38803_A016))needs to be imported from overseas(http://kosis.kr/nsportalStats/nsportalStats_0102Body.jsp?menuId=4&NUM=140).In contrary water is locally sourced and plentiful(huge Han river across Seoul) thus the price is low. I did not runthe calculation side by side since this I’ble was just a simple poor man’s wayof cooling but I am almost certain A/C wouldn’t cut it in terms of energyconsumption in this case.So much to talk about,but I wanted to answer most of the comments here. Anyways thanks for greatideas, inputs and comments! I could be wrong so leave a comment if you haveanything to say. Thanks!

maybe I should offer the landlord this. It may be one of the best solution without having to cause too much trouble in my case.